// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_CAMERA_DEVICE_H_
#define CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_CAMERA_DEVICE_H_

#include <memory>
#include <string>

#include "base/callback.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "content/common/media/video_capture.h"
#include "media/capture/video_capture_types.h"

class GURL;

namespace content {
class PepperMediaDeviceManager;
class PepperCameraDeviceHost;

// This object must only be used on the thread it's constructed on.
class PepperPlatformCameraDevice {
public:
    PepperPlatformCameraDevice(int render_frame_id,
        const std::string& device_id,
        const GURL& document_url,
        PepperCameraDeviceHost* handler);
    ~PepperPlatformCameraDevice();

    // Detaches the event handler and stops sending notifications to it.
    void DetachEventHandler();

    void GetSupportedVideoCaptureFormats();

private:
    void OnDeviceOpened(int request_id, bool succeeded, const std::string& label);

    // Called by VideoCaptureImplManager.
    void OnDeviceSupportedFormatsEnumerated(
        const media::VideoCaptureFormats& formats);

    // Can return NULL if the RenderFrame referenced by |render_frame_id_| has
    // gone away.
    PepperMediaDeviceManager* GetMediaDeviceManager();

    const int render_frame_id_;
    const std::string device_id_;

    std::string label_;
    int session_id_;
    base::Closure release_device_cb_;

    PepperCameraDeviceHost* handler_;

    // Whether we have a pending request to open a device. We have to make sure
    // there isn't any pending request before this object goes away.
    bool pending_open_device_;
    int pending_open_device_id_;

    base::ThreadChecker thread_checker_;

    base::WeakPtrFactory<PepperPlatformCameraDevice> weak_factory_;

    DISALLOW_COPY_AND_ASSIGN(PepperPlatformCameraDevice);
};

} // namespace content

#endif // CONTENT_RENDERER_PEPPER_PEPPER_PLATFORM_CAMERA_DEVICE_H_
